Propane burns beneath a container of water. The temperature of the water increases from 18 ∘C18\ ^\circ\text{C}18 ∘C to 31 ∘C31\ ^\circ\text{C}31 ∘C.
Which statement about this reaction is correct?
Energy is transferred from the reacting chemicals to the surroundings, and the products have less energy than the reactants.
Energy is transferred from the surroundings to the reacting chemicals, and the products have less energy than the reactants.
Energy is transferred from the reacting chemicals to the surroundings, and the products have more energy than the reactants.
Energy is transferred from the surroundings to the reacting chemicals, and the products have more energy than the reactants.
85 exam-style questions on AQA GCSE Chemistry 5.1 Exothermic and endothermic reactions, covering 5.1.1 Energy transfer during exothermic and endothermic reactions, 5.1.2 Reaction profiles, and 5.1.3 The energy change of reactions. Each one has a worked solution and a mark scheme showing where the marks go.